#!/bin/bash

DB_HOST="127.0.0.1"
DB_PORT="27017"
DB_USER="admin"
DB_PASSWD="admin123"
COMP="gzip"

DIR=$(cd "$(dirname "${BASE_SOURCE[0]}")" && pwd)
BACKUPDIR="$DIR/backup"
mkdir -p $BACKUPDIR/{hourly,daily,weekly,monthly}

if [ "$DB_USER" ]; then
	OPT="$OPT --username=$DB_USER --password=$DB_PASSWD"
fi

function dbdump() {
	mongodump --quiet --host=$DB_HOST:$DB_PORT --out="$1" $OPT
    if [ -e "$1" ]; then
		return 0
	fi
	echo "ERROR: Failed to create dumpfile: $1" >&2 || return 1
}

function dbcompress () {
    SUFFIX=""
    dir=$(dirname "$1")
    file=$(basename "$1")
    if [ -n "$COMP" ]; then
        [ "$COMP" = "gzip" ] && SUFFIX=".tgz"
        cd "$dir" || return 1
        tar -cf - "$file" | $COMP --stdout | cat > "${file}${SUFFIX}"
        cd - >/dev/null || return 1
    else
        echo "No compression option set, check advanced settings"
    fi
    return 0
}

echo "Start backup of Database Server - $HOST on $DBHOST"
echo ======================================================================
echo "Backup Start $(date)"
echo ======================================================================

# extend it to take weekly and daily backups
FILE="$BACKUPDIR/monthly/$(date +%Y-%m-%d_%Hh%Mm).$(date +%B)"

if [[ -z "$FILE" ]] ; then
    echo "ERROR: No backup frequency was chosen."
    exit 1
fi

dbdump "$FILE"  && dbcompress "$FILE"

echo ----------------------------------------------------------------------
echo "Backup End $(date)"
echo ======================================================================